Smoke-consuming furnace



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(No Model.)

J. J. HALL. SMOKE GONSUMING FURNACE.

No. 254,007. Patented Feb. 21,1882.,

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J. J. HALL. I SMOKE GONSUMING FURNACE. No. 254,007. Patented Feb.

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UNITED STATES PATENT OFFICE.

JOSEPH J. HALL, OF CHICAGO, ILLINOIS.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 254,007, dated February 21, 1882.

Application filed August 24, 181-31. (N0 model.)

To all 'whom it may concern Be it known that I, JOSEPH J. HALL, of Chicago, in the county of (look and State of- Illinois, have invented certain new and useful Improvements in Smoke-Consuming Furnaces, of which the following, in connection with the accompanying drawings, is a specification.

In the drawings, Figure l is a front elevation of a smoke-consuming furnace embodying my invention. Fig. 2 is a vertical longitudinal section in the plane of the line 00 m of Fig. 1, viewed in the direction of the arrow there shown. Fig. 3 is a section inthe plane of the line y y of Fig. 2, viewed toward the front of the furnace; and Fig. 4 is asection inthe same plane, viewed toward the rear of the furnace. Fig. 5 is a detail view of the nozzle.

Like letters of reference indicate like parts.

A represents the fire-pot or heating-chamber of the furnace. B is a retort. E is the boiler. F is the fire or bridge wall or deflector. J is the grate. c is the dead-plate. The roof to of the retort abuts on a central wall, (6, and on the side walls, a a", of the furnace, as shown, thus making a double retort, each chamber of which is comparatively narrow, and each of which has an open rear end through which the retort communicates with the chamber A, as indicated by the arrow shown in Fig. 2. It is not absolutely essential, though preferable, that the roofs of the. retortchambers should be arched.

' S S are doors in the smoke flue, and RIt are dampers in the said doors. These doors are arranged, as shown, in front of the chambers of the retort, respectively. The grate extends to the dead-plate or through the retort, forming its floor, and the retort is arranged underneath the boiler. Overlthc retort and under the boiler is an air-space, g, open at its rear end.

F is the bridge-wall, the lower part of which stands vertically, and the upper part, F, is inclined toward the rear end ofthc retort.

In other respects the furnace may be made in any well-known or suitable way.

. I feed the furnace through the doors S S, throwing the coal in upon that part ofthe grate which constitutes the floor of the retort. The air finds its way to the grate in the usual manner, passes through it or the floor of theretort in suflicient volume to support combustion in the retort, and mingles with the ignited gases therein. The heat thus produced soon heats the walls of the retort intensely, and this heat is reflected back upon the coal in the retort, and further aids combustion therein, the combustion being so nearly perfect that none, or very little, of the gases and products of combustion commonly producing what is known as smoke enter the chamber A in that form. After the coal in the retort becomes coked I push it back upon that part of the grate which lies within the chamber A. In this manner an incandescent mass is produced in the chamber A, which consumes the gases and products of combustion liberated therein; also, the in clined part F of the wall F serves as a deflector and deflects the heat back toward the open ends of the retort, so that combustion is further aided and an intense heat produced underneath the boiler.

The air-space 9 permits expansion of the boiler without danger of displacement and injury either to the boiler or to the roof of the retort.

By making the retort double or dividing it into two comparatively narrow chambers by means of. the central wall, a, the radiating surfaces are greatly increased in proportion to the amount of coal in the retort at any one time,-

and as those walls become intensely heated, usually to a white heat, it will be perceived that combustion will be much more perfect than if the wall a. were not employed.

Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is

l. The combination, with the fire-pot, boiler, and grate of a smoke-consuming furnace, of the retort B, open at its rear or inner end, and arranged in the forward part of the fire-pot and between the boiler and the grate and containin g the central wall. a, dividing the-retort into two longitudinal chambers, each having the grate of the furnace for a floor, substantially as and for the purposes specified.

2. The combination, with the fire-pot, boiler,

and grate of a smoke-consuming furnace, of I the retort B, arranged in the forward part of the fire-pot and having over it the air-space g, and open at its inner or rear end and arranged between the boiler and the grate, and containing the central longitudinal wall, a, the grate serving as the floor of the retort, substantially as and for the purposes specified,

3. The combination, in a smoke-consuming furnace, of the fire pot or chamber A, the boiler E, the grate J, the retort 13, arranged in the forward part of the fire-pot and extending over the grate and underneath the boiler and having an open rear end, and the bridgews'all F, m

arranged in the rear of the pot or chamber A, and having its upper portion, F, inclined toward the rear or open end of the retort, substantially as and for the purposes specified. JOSEPH J. HALL. Witnesses:

F. F. WARNER, H. FRANK FUR'IIER. 

